Surgical apparatus for endoscope

Abstract

Provided is a surgical apparatus for an endoscope that can appropriately and easily perform mounting work of an endoscope onto an outer tube. An outer tube, which passes through a body wall, is inserted into a body cavity, and guides an endoscope and a treatment tool into the body cavity, includes a slider that is an interlocking member that moves the endoscope and the treatment tool forward and backward in an interlocking manner. At the time of mounting of an endoscope in which an endoscope insertion part is coupled to a slider body of the slider, the endoscope insertion part is inserted to a position where a larger-diameter part provided in the endoscope insertion part abuts against a base end surface of an outer tube. Accordingly, the slider body can be coupled to a predetermined suitable position of the endoscope insertion part.

What is claimed is: 
     
       1. An endoscopic surgical apparatus comprising:
 an endoscope having an observation window at a distal end thereof; 
 a treatment tool having a treatment part at a distal end thereof; and 
 an outer tube that passes through a body wall, is inserted into a body cavity, and guides the endoscope and the treatment tool into the body cavity, 
 wherein the outer tube includes
 an outer tube body having a distal end, a base end, and a longitudinal axis, 
 a first distal end opening and a second distal end opening provided at the distal end of the outer tube body, 
 a first base end opening and a second base end opening provided at the base end of the outer tube body, 
 an endoscope insertion passage that is provided along the longitudinal axis of the outer tube body, allows the first distal end opening and the first base end opening to communicate with each other therethrough, and allows the endoscope to be inserted therethrough so as to be movable forward and backward, 
 a treatment tool insertion passage that is provided along the longitudinal axis of the outer tube body, allows the second distal end opening and the second base end opening to communicate with each other therethrough, and allows the treatment tool to be inserted therethrough so as to be movable forward and backward, 
 a slider that has an endoscope-coupling part coupled to the endoscope inserted through the endoscope insertion passage, and a treatment tool-coupling part coupled to the treatment tool inserted through the treatment tool insertion passage and is movable forward and backward inside the outer tube body, wherein the endoscope-coupling part comprises a through-hole, and the treatment tool-coupling part comprises a sleeve, 
 a distal end cap that is provided inside the outer tube body and restricts movement of the slider to the distal end side of the outer tube body, and 
 a base end cap that is provided inside the outer tube body and restricts movement of the slider to the base end side of the outer tube body, and 
 
 wherein the endoscope has a positioning part at a position apart by at least Lt+L 1  from a distal end of the endoscope toward a base end side thereof when a movement distance of the slider is defined as L 1  and a length of the outer tube body in a longitudinal axis direction is defined as Lt, 
 wherein the movement distance of the slider is from a first position where movement of the slider to the distal end side of the outer tube body is restricted by the distal end cap to a second position where movement of the slider to the base end side of the outer tube body is restricted by the base end cap. 
 
     
     
       2. The endoscopic surgical apparatus according to  claim 1 ,
 wherein the positioning part has a distal end that abuts against a base end surface of the outer tube body from the base end side. 
 
     
     
       3. The endoscopic surgical apparatus according to  claim 2 ,
 wherein the positioning part is gripped by an operator who operates the endoscope. 
 
     
     
       4. The endoscopic surgical apparatus according to  claim 3 ,
 wherein the positioning part has a shaft part having a larger external diameter than an internal diameter of the first base end opening. 
 
     
     
       5. The endoscopic surgical apparatus according to  claim 4 ,
 wherein the shaft part has an outer peripheral surface in which at least one of an antislip shape or an antislip member is formed. 
 
     
     
       6. The endoscopic surgical apparatus according to  claim 1 ,
 wherein the positioning part is a marker that is formed on a surface of the endoscope and indicates a position apart by at least Lt+L 1  from the distal end of the endoscope toward the base end side thereof. 
 
     
     
       7. The endoscopic surgical apparatus according to  claim 1 ,
 wherein the positioning part is provided at a position apart by Lt+L 1  from the distal end of the endoscope toward the base end side thereof. 
 
     
     
       8. The endoscopic surgical apparatus according to  claim 1 ,
 wherein the slider has a non-interlocking region where the forward and backward movement of either the endoscope or the treatment tool does not interlock with the movement of the other and a interlocking region where the forward and backward movement of either the endoscope or the treatment tool interlocks with the movement of the other.